UP MOVE by Jawbone Yellow Slim Strap Flexible and comfortable to wear day and night, and with it's adjustable clasp you can size it to fit any wrist. Optimal for tracking total sleep, light sleep and sound sleep with your UP MOVE Made with medical-grade rubber Activity tracker and clips not included Android compatibility - UP2, UP3 and UP4 are compatible with Android 4.3 (Jelly Bean) or later. iOS compatibility - UP2, UP3 and UP4 are compatible with the following iOS devices:iPhone 4S or newer, iPod Touch 5th generation or newer, iPad 3 or newer, iPad Mini 1st generation or newer, iPad Air 1st generation or newer